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I started downloading the Bitcoin blockchain via my MacBook Pro onto my 1TB external hard drive. I want to use my iMac to finish the download. I plugged my EHD into my iMac and checked to blocks folder and it contained the previous transaction I downloaded (86GB). The wallet.dat, peers.dat, chainstate, banlist.dat and fee_estimates.dat files. I opened Bitcoin Core and moved the directory to the blocks folder where the previous transaction I downloaded are. I followed the steps to start the sync. I expected the blockchain to recognize the blocks and start where it left off on my MacBook but it started from the beginning. Any ideas on how to pick up where I left off?

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Even if you transfer all the data from a fully synced client, the bitcoin client still needs to validate those blocks. It will still take a while, but should be quicker than downloading all the data and verifying.

ANSWER IS NOT ACCURATE.
EDIT: If you copy the chainstate, there shouldn't be any work the receiving system should perform anymore - the software wouldn't even know it was moved. It's possible the wrong directory was used.

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  • Thanks for the response. I was hoping that was the case and yes, it is moving faster than before.
    – Dr.Von
    Jan 1, 2017 at 21:37
  • If you copy the chainstate, there shouldn't be any work the receiving system should perform anymore - the software wouldn't even know it was moved.
    – Pieter Wuille
    Jan 3, 2017 at 10:35
  • Downvote. This answer is incorrect.
    – Pieter Wuille
    Jan 3, 2017 at 10:36
  • Pieter, any ideas why his client would still be still syncing?
    – m1xolyd1an
    Jan 3, 2017 at 13:18
  • My best guess is that he used the wrong directory.
    – Pieter Wuille
    Jan 3, 2017 at 17:21

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